Film-testing machine



G. L. CH-ANIER.

HLM TEsTiNG MACHINE. l

APPLICTlN FILED AUG-5,1921.

Patented July 1l, 1922'.

5 SHEETS-SHEET l.

@- el E N amm-,m

A TTHNEYS Patented July 1l, 1922...

5 SHEETS-SHEET 2.

G. L. CHANlER.

FLNI TESTING MACHINE.

APPLICAUON FILED Aus.5.1921.

G. L. CHANIER.

FiLM TESTING MACHINE. APPLICATION FILED AuG.5.1921.

Patented July 11,1922.

G. I.. CHANIER.

FILM TESTING MACHINE.

APPLICATION FILED AUG.5,1921.

2g T0 T2 JY t A TTORNEIS G. L. CHANIER.

FILM TESTING MACHINE.

APPLICATION FILED Auel5, 1921.

Patented July 1l, 1922.v

5 SHEETS-SHEET 5r.

Wm m# A TTOH/VEIS State of UNITEDjSTATl-:S'

PAT-ENT OFFICE.

GsToN Louis CEANIEE, or .IEEsEY CITY, NEW JERSEY, AssIoNoE To PATHE 1 EXCHANGE, INC., or NEW Yonx, N. Y A CoEroEATIoN 0E N Ew Yoan.

`Erme-TESTING MACHINE.

To all wlwmt may l Beit known that I, GAsToN LoUIs CHANIEE, a citizen of the United States, residing at Jersey Cit in the county of Hudson and New Jersey, have invented certam neve'and useful Improvements in'Film-Testin Machines; and I do hereby declare the foowing to be a full, clear, and exactdescription of the invention, such` as -will enable others-skilledv in the art to which it ap pertains to make and use the same.-

My vpresent invention relates to a machine to test the proper light to be usedwhen it is desired to make av positive print from a negative film; the object of the invention being to do awayin a large measure with the expensive services of the v'skilled film tester now required for jsuch work, to eliminate thev guess work now incident to'such testing, and to effect a materialsavlng 1n "time and expense in the testing operation.

' To make positiveprints from a motion rays of which act, through the negative, on-

the silver emulsion ofthe positive film. Iny

'picturenegativq the unexposed positive film is brought contact Withi thevnegative and run through ama'chine-having a llght, the

order that a good print befobtained from the ing ofthe shutter ofthe printing machine or by Other.' means. f Printing machines have strengthsofA light; 40l

. nary custom in motion picture laboratories -to have "a man, 'specially trained, estimate -exposed posltive film afterv treatment of samein the propersolutions, it is necessary to use a light ofthe conecthstrength.

The strength of` the'lightcan be changed by putting the light closer or farther from the film, by introducing a resistance in the circuit, or by reducing or enlarging the openusually a Vscale of from 12 to20 different --To' Select the proper hght, ais the Ordi- .'the 4d ensityfof'the negative by transmitted A short pieceoffilm of about two-feet'isv h t, and `from that guesslthe correct amount l of light needed" for, printing 'the positive.

' delegated waa-the selected. light and tie j ingly vand another short piece printed, unless n'e'g is( willing toftake a chance' 'on"having guessed rif ht.A `Of course this means waste of "Application med 'August 5, 1921. 4serial No. 490,054.

The machine chine has paratus, parts4 being broken sake of clearness, andthe d in order-toascertainthat the light' 4has been lcorrectly If theflight is 'somewhatflarger scale than in too weak or'too ..s t ron'git is changed accordi Specification ofLetters Patent. i I Patnted JuilyA 11, 1922.

to elimina-te the guesswork, the waste of film i and of time, and make the selection of the proper l1gh t simple` enough so that anybody, famillar with photography, can select the light.

The film testing machine has means for controllin the light so as to give the same scale of llght as-on the printin machine.

the various lights, so that, after the film sample is treated, vthere is one positive pictn re showing what result may be obtained wlth each ofthe different lights. rIt is consequentl i an easy matter to select with ceri tainty t e correct light necessary to make positive ,prints from this particularnega' prints one picture w1th each of' one picture on every alternate light. For

example, if the scale of the printingl ma'- machine will print'one picture on every even llght, or one on every odd light. This will then make 8" sample pictures, '05pm-half foot of film, for 4the whole scale of light, when the usual two foot only one light which has been guessed at. A sample on every alternate light is suilicient It is evident that if one of two consecutiv lights is' a little too strong and the other a little too weak, the one between them will be right.

The film testing machine can also be used to make a negative sample print from a positive film, when one wants to print a lduplicate negativefrorn a positive print.'

My invention will be more fully`understood after reference to the drawings, in which like parts several views, and in'which; Figure 1 is a plan view of the complete apaway for the r being shown in the closed position.

"Figure 2 shows a section along thejline .2 -2 ofFig'. 1 and looking ins-the direction of the arrows, the parts bein 'shown ona i '1.- IFigure 3' is a side elevations owing the -fapparatus "o n l a much smaller scale, @with 'the arrangements for: holding and re-windlng the posltive and negative lmsmounted on the supporting table.. Figure 4 shows a section along the line 16 different lights, the film testing? length` of film has l accompanying are indicated 4by slmllar reference symbols throughout the ,6 6 of Fig. 1,

1 -4; of Figuie 1, and looking inthe direcy tion of the arrows, the parts lbeing shown y, tion of the arrows.

Figure 6 shows a. section along the line and looking in the direction of the arrows, parts4 being shown in elevation.

Figure 47 is a section along the line 7-7 of Fig. l, parts being shown an a larger scale, and illustrates the construction traveling circuit closing bridge.

Figure 8 is a diagram showing the electric connections for the bridge and the red and white lights. y l

Figure 9 1s a plan view'of part of the apparatus shown in Figure l, but with the door in the open position, and the carriage of the at the end of its travel; and

Figure 10 is a side elevation of the apparatus shown in Figure 9,` yparts being omitted for the sake of 'clearness in the drawings.

A represents the platform on which the various operating parts are supported. It may conveniently consist of a table top A supported on the legs A', as, showny in Fig. 3, but any convenient support for the platf form will suffice.

Mounted on the upper face of this platform ,are the brackets A2 and A3. Journaled in the bracket A2 is the roll B carrying the negative film B which is conducted through the apparatus as will be hereinafter described, and 1s wound up on the re-winder B2 which is journaled on the brackets A3.

Mounted on the bracket A2 is the film box C, containing the positive film C', which is in the form of a roll C enclosed in said box, which roll is pivoted on a spindle c. This positive lm C passes through the apparatus as will; be hereinafter described, and is conveyed to the box C2 suspended from the platform A for treatment. in the Suitable guide rollers are provided for both the positive and negative films where desired. l i y D represents an auxiliary frame mounted above the platform, A on which the sliding carriage hereinafter described `travels. D represents a casing provided with a light opening Do above the white light E used in printing, and this opening'D0 is provided with a slot ai, see Figs. 2 and 6, through which the white light passes in the operation of printing. This white light E is mounted in the light-tight box E in the usual way. The apparatus is also provided with red light F.

Mounted in the platform A is a block or l slab G of insulating material,v see Figs. 1,

4, 6 and 7. This block of insulating material carries a contact strip g connected to one of the terminals of electricity, as shown diagrammatically in F ig. 8, and the said block G is also provided with a series of contact pieces g connected tovarious portions of the resistance coil G', as shown diagrammatically in Fig. 8, the end of which resistance coil is connected by the conducto-r e t0 the terminal e of the white liight E.

A traveling bridge H is caused to move over these contact pieces g and Contact strip g, and to automatically cut out or insert resistance in the circuit applied to the white light. The construction of this traveling bridge is` shown in detail in Figs. 6 and 7 in which la and It are two contact points pressed into engagement by the springs k2, thus bridging the circuit from the nearest contact piece g and the contact strip g.

l-nFigure 8 I haveshown ten such contact pieces g', with the bridge H indicated in dotted lines, making the circuit through the fifth Contact piece from the left, closing the circuit. It will be seen that by moving this bridge from the left to the right, see

Fig. 8,*ten separate resistances may be inl serted in the circuit of the light E, and thus ten different intensities of light used in printing may be secured.

The electric circuit through the lamp E and F is controlled by means of the switch ion driven by the power shaft, as will be hereinafter more .fully described; the parts being restored to the initial position by the return weight attached to chains XX fastened as at le on each side of the traveling carriage J, and which run over pulleys K2 carried by brackets K", supported by plat-- form A. (See Figure 4.) An apron K', the end -of which 7c is attached to the carria e J, (see Fig. 2), passes also over pulley 2 and` is kept taut by a counterweight X. The other end of said carriagev has a similar apron K4, passing over the pulley K?, and having attached to the'free end thereof, a counterweight K". The purpose of these aprons kept taut by their counterweights is to prevent the negative film from getting scratched on the frame D when moving with the traveling carriage in its reciprocal movement. v

A suitable shock absorber is provided to Inthis way the shock absorber may be very.

' foppositeends of the carriage J (see Fi v5 and 9)" and this .film' is supported on t e` '15 .of .the positive lmis rovevbetween. the raisedi ing carriage J\ returns tofthe initial position -under the action of. the weight K,'such, for instance, as thel pneumatic shock absorber L, shown in Figs. 1`and 9. The piston rodv 15.v L2A of said shock absorber .is preferably'A screw;threaded near .its end to engage the "adjusting nutsv l on either side of the bracket L carried by the-reciprocating carriage' J.

readily adjusted' to suit required conditions.

AThe ne ative film B- is rove between the guide rol ers j and jf and their idlersat slotted plate J", see Figs. 2 and $9. .The end guide rollers mand underV the yroller/vfat one end of the hinged door M j'(see Figs. 1,

2, 3 and 10), andpasses beneath the smooth I guide roll t and engages a toothed feeding roller vTo on the lshaft t,"journaled at` the ,other end of said door, as shown'in Figs.

2, 3 and '9. -When the door M is in the-closed position, shown in Figs.A 1 to 6, the two films are held in superposed contact, andl aredrawn together across the light -from .the

i lamp-E, 'as will be hereinafter described, but i when the doo'ri-M is open, as shown in Figs.I

'-9and 10, and in dotted lines in Fig. 6, the ftwo films arev separated.

vPerfect contact 'of the two films, when the door iv closed, is better. obtained by replac- .ing the smooth'plate m by a pad of rubber. or felt or .othersuitable materlal, for by any other means. j

'Ihe door Mis. swung open by the coil sprmgs M',gsurrounding` the rods m0, form-v mg part of the hinges M2, see Figs. 1 andv handle N2. j When the latch is--withdraw-n, 'the -door will .be released and .will spring from the closed position shownin full' lines in Fig.

6 tothe open position shown in dQttedlines in said figure.

In order to lessenthe shock of the automatic upward swinging movement of the door, I provide a buiier yarrangement shown most clearly in Figs- 2, l5 and 46., in which' O andO represent two standards,1each pro-- vided-@With --a' butler s ring'.` 102,' which lis shownin .full lines in i 6 when the door y "isf closed, but" which sprlngs O? are coml pressed whenftlie doorfjis swung up to the Vswung down plate 'm' securedl to the bottom of fsaid door, 'and .under the roll t and thenunder thev into the.

open positionasindicated in dotted linesin n order to lockthe door in theopen po-A sition I provide a suitable-spring' imlressed catch, such' as the bell. crank lever.' (see Figs. 12, 4 and 6), pivoted as at p between the standards O and O', and provided with with an operating armpa, the said claw p2 being normally pressed towards the engagva cam 'face p (see Fig.'4 6) and a claw p2,`

ing position bythe leaf springPf.- It will 4be seen that as the door is'lifted. it will wedge vback the ,cam face p until the edge of the door passes the claw and the spring P will then cause the notch p". to lsnap up andy engage lthe contiguous-edge. of the door. To release the latch press the arm p to the left (see "Fi ..h2I1d.

.The spring and thewedge face of the latch N will tend to ease the shock when the door is closed by hand.

- As 'already "described, the traveling carriage J, with the hinged door M mountedy thereon, is restored to the'initial position by 6) -when the door may be the return'weight K; but to feed the two forward together,-with the two films heldin contact, I provide varack J 2, see Fig. 5, se-

cured to the lower side of thecarriage'J, in

which rack meshes the pinion Q, fast on the shaft Q', which may be -turned manually by v means of the-knurled wheel Q2 or'thi's shaft Q may be power -drivenas by the 'clutch' connection R' to the countershaft Shaving a bevel gear S', "(see Fig. 1), meshing with the bevel pinion S2 -driven by the driving.

pulleysa. Obviously an. electric motor or other driving means may be substituted for the pulley S3.

In order to conveniently control the .power mechanism, and at-the Sametime automatii cally control the electric light circuit, I provide a clutch lever R pivoted as at i and connected at one end to the clutch member R, and at the otherend to the connecting rod R2 controlled' by .the handle R3. "This clutch lever R is normally thrown to the disengaged position by the coil spring R,

and is heldin the locked position by the l spring impression latch R5 which is prov-ided with-a catch rf engaging the lug r2' on the vlever Rv.' 'This' latch is shown in the engaged position in'Fig. 1, and in the disengaged position in Fig. 9. This latch R5 'is pivotedl as atI 1" and is acted upon by the-spring R.

The latch is also provided `with an adjustable screw stop 1'* sol that it "may be properly adjusted. It will be seen ythat Awhen the clutch mechanism is in engagement, the latch R'i will hold the lever -R in the position shown in Fig. -1, in whichv case the power mechanism is free to act.

.When the parts are inthe osition shown i in'Fig. 9, the counterweight riage-J back in itsstartingV position, rellevpulls/the carsparking was avoided.

ing the pressure-on screw 1". Spring R6 will then bring latchR5 in such va position that by pulling on the handle R3 against the action of the spring R4, the lock r2 will wedge back the catch r', and the spring It will snap the said catch in engagement above said lug in the position shown in Fig. 1, at which time the clutch arrangement will beheldin the operative position.

In order to release' by hand the clutch mechanism, push away. the catch 1" by hand and the spring R* will restorev the parts to the position shown in Fig. 9. The stop collar W limits the travel of the .rod R2.

The lever R carries two contact points l1"*5 and 4r which coact with the switch arrangement I and complete the circuit through the white lightN when the clutch is in the position shown in Fig. l, and through the redclight when the clutch is in the pos'rw tion shown in Fig. 9.

Referring to Figure 8, when the levenR' is in the position shown in Fig. l, the red light is short-circuited by the' lever and the white light only is'lighted rllhe current coming through the wire marked runs through the wire going to the small contact piece (see Fig. 8), th'en through the switch, then down to they bulb E, then through the wire e2 then through the coil G', then y. through o ne of the small contact pieces g',

then through the' traveling bridge andthecontact piece g y When the lever is in the position shown in Figure 9, the current entering through the wire marked -lgoes to the red light F, then through the upper Wire to the white light E, then through the wire e?, through the first contact piece g on the left, and through the traveling bridge to contact piece g. AThe red bulb being of small amperage' comparedto the white bulb, in this ca'se the red bulbv only is li hted.

T e wiring could be done, of course, in a different way, so as to have vthe current go through either the red light or'the white light, but it was found in practice that there `was quite somesparking when the contact was changed from one light to the other, and it was found that by letting the lcurrent go through the white light all the time, this Any suitable arrangement of switch mechanism and-electric connections may be used for this purpose, and I do not claim-any special arrangement, as such are well known in lthe art; my invention being limited to other details which will be hereinafter pointed out in the claims.-

which is operable onlv when the'door 1s open.

This arrangement comprises the rack T mounted on brackets T", which rack is raised journaled on the top ef thefdoor as shown in" Figs. l, 5, 9 .and '10. ,'This actuates the feed wheel To by meansv of which the positive film is fed to the machine. It will be seen 'that when'the door is lifted, any further movement of the carriage J, carrying the door with it, will cause the fixed rack T to rotate the pinion yT2 andjwill operate the positive film feed, drawing a short fresh length of said film over the negative film which latter in the meantime is not moved at all.

Thus, foreach operationof the machine aV fresh strip of positive film -may be drawn over the negative film and subjected to the action of lthe light, as will be hereinafter more fully described. The door may be opened at any time by simply releasing the latch N, as before described, but in order to provide for the automatic opening of the door when the carriage J reaches a predetermined limit of its travel, I provide a cam V, see Figs. l, 5 and 9, ,which is secured to the platform A and engages the roller n on the stem ofthe latch N, as shown most clearl in Figs-5, 6 and 9. When the carriage with the door M mounted thereon, moves far enough for this roller n to engage the cam V, said roller will ride up on said cam, drawing the latch N back against the action of the spring N and allowing the door to swing up into the open position where it will beheld securely bythe latch P, as already explained with refer- Y ence to Figs. 5 and 6.

Thus it will be seen that during the operation of printing the test strip, the door is held down and locked in the closed position, and as soon as the printing has been completed the door is automatically released and springs up to the raised position, permitting a fresh strip or segment of a strip i of the positive film to be automatically fed i to the door, so that when the door is returned to the closed position a ain a fresh surface of sensitive positive lm may be eX osed to the action of the light.

he opening ofthe door will automatically-break the electric circuit through the white light, but the closing of the door will automatically complete lthe circuit. This may be accomplished in any convenient or well known Way, and the electric connections part of my present invention will not be further described herein.

`By providing a suitable switch arrangecarriage travels over any one of- 'the segl for accomplishing this purpose not being a l ments g -and thus a series of test prints' may be made with thelight under varyingand its idlers, placed over the slotted plates J so that the thin-bars offthe plate corres spond to spaces between and threaded through t idlers. (Figure 9).

The roll of ositive raw film is put in lmibox C. Ahe film is then threaded through the rollers m, under roller lm2, run

e roller j and its along the pad m', then under roller t', land roller t", the teeth on the sprocket T0 en` the perforations on each side of.

4 the Iimage of the negative on the bpositive "-fi'lm. As the carriage progresses the contact point la. ofthe traveling brldge Hv is threaded-,between the sprocket T and the va inv hegfiln. I

The door is then closed brin ing the two films in contact. -The handle 3 is pulled enga ing the clutch with the countershaft S. he contact oints 1'* and r being now in the position sliown in Fig. l, the white light is on and the red light is ofi'. v

' The traveling carriage and the door then move forward carrying the two films over the slot d, the white light then printing passes successivelyon every contact iece g', thereby varying the strength of the llght. The length of the contact pieces g is the same as the length of a picture, so that the strengthl of the light is changed at each picture but does .not vary as this picture passes over theslot d.

When the carriage arrives at the end of its travel, the cam V opens the latch N. The coil springs M open the door lockin it on catch P, andengaging pinion T2 wit T. (See Fig. 9.) v

As the counterweight K pulls the carriage back in its open position, the pinion T2 travelling on rack T, turns the sprocket T", which feeds the exposed section of film off the machine into box C2, pulling an unexposed Section inits place.

The negative is then wound up by hand on the re-Winder A3,. until another portion to vbetested is reached, when the whole rocess is repeated. When all the various g 4scenes on the 'roll of negative have been pictures on the film,`

rack

f After the film has been treated-,itlie'correct light' is chosen from the tests, .for each ofthe scenes of the negative to be printed.

It will. be obvious that various modifications mi'ghtbe made in the herein described apparatus, and in 'the construction, Acombination and arrangmentfof parts which could be used without departing from the spirit` of my invention; and I do not mean' to limit the invention to such. de tails except v'as particularly pointed out in the clairns.

-Having thus described my invention what I claim and desire` to secure by Letters Patent of `the United Statesiszd- 1. Apparatus of the character described,

-comprising a platform with-a light aperture therein, .and an electric light mounted be;

low said aperture; an electric circuitconnected to said' light, and including for moving sald carriage longitudinally, and4 means controlled by said'carriage for clos- -ing the electriccir'cuit seriatim through the several resistance coils, thereby increasing a' series Y of resistance coils.; a traveling carriage, wlth means for holdlng the' negatlve and. po'sltive of decreasingthe intensity of the electric light.

l2. vApparatus of the character described, 'i comprisin ture therein, and an electric light mounted a platform with a' light aperbelow said aperture; an' electric circuit connected to said light, andincluding a series of resistance coils, a reciprocating traveling -carriage, with means for holding the negative and positive films in superposed posltlon thereon, means for moving said carriage longitudinally in reverse d irections, and means controlled by said carriage for closlng the electrlc .clrcuit seriatim through the several resistance coils,'thereby. increaslng lor decreaslngthe intensity of the electri'c light.

3. Apparatus of the character described,

comprising a platform with a light aperture,- therein, and an electric light mounted below said aperture; an electric circuit connected to said'light, and including a; series of resistance coils, areciprocating traveling. cariage, means for holding the negative and when vmoving inone direction, meansY for separating. the two films when said carriage moves in the opposite direction, means for movlng sald carriage longitudinally in re` verse directions, and means controlled b vsaid carriage for-closing the electriccircult seriatim through the several resistance coils comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an electric circuit con? nected to said light, and including a series 130 iid positive films 1nsuperposedposit'lon thereon, 5.

i .of resistance coils, a reciprocating traveling carriage, means for holding the negative and positlve lms in superposed position thereon when moving in one direction, means for separating the two films and for simultaneously feeding the positive lm when said carriage moves in the opposite direction, ymeans for movlng said carrlage long1tud1 nally in reverse directions, and means con`- trolled lby said carriage for closing the electric circuit seriatim through the several resistance'coils, thereby increasing or decreasing the intensity of the electric light.

5. Apparatus of the, character described, comprising a platform with a light aperture therein, andan electric light mounted below said aperture; an electric. circuit connected to said light, and including a series of resistance coils; a traveling carriage, with means for holding the negative and .positive filmsln superposed position thereon, means for 'moving said carriage longitudinally, and

a bridge carried by said carriage and adapted to close the electric circuit seriatim through the several resistance coils, thereby increasing or decreasing the intensity of the electric light thrown on the passing films,

6. Apparatus of the.character described, comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an electric circuit connected to said ligh t, and including a series of resistance v-coi s, a reciprocating travel- `ing` carriage, with means for holding the negative and 'positive films in superposed position thereon, and for releasingsame when desired, means for moving said carlongitudinally in reverse directions, bridge carried by said carriage and adapted to close the electric circuit seriatim l through the several resistance coils, thereby increasing or decreasing the intensity of the electric light thrown on the passin films'.

7. Apparatus of the character escribed,

comprising a platform with a light aperture therein, and an'electric light mounted below intensity of the electric'light thrown on the passing films. f

8'. Apparatus of the. character described, comprising a platform with a light aperture therein, and an electric light mounted below said a erture; an electric circuit connected to sai light, and including a series of vresistance coils with corresponding contacts,

comprising a platform with a light aperture the several resistance coils, thereby increasingeor decreasing the intensity of the electric light thrown on the 'passmg films.

9. Apparatus of the character described;

' -comprising a platform with a light aperture therein, and an electric light mounted lbelow said aperture;4 an electric `circuit connected to said light, and including a series of resistance coils, a reciprocating traveling carriagefwith means for holding the negative and positive films. in superposed position thereon, and for releasing same when desired, means controlled by said carriage for closing 'the' electric circuit seriatim though the several resistance coils, thereby increasing or decreasing theintensity of the electric light, and means for moving said carriage longitudinally vin reverse directions, comprising power mechanism and gearing operated, thereby for moving said carriage during the printing operation, means for automatically releasing said driving gearing, and a return weight with parts operated thereby for restoring said carriage to the initial position.

10. Apparatus of the character described,

therein, and an electric light mounted below lsaid aperture; anl electric circuit connected to said light, and including a series of re sistance coils, a reciprocating traveling carriage, means for holding the negative and positive films in superposed position-thereon when moving in one direction, means for separating the twofilms when said carriage moves in the opposite direction, means controlled by said carriage for closing the electric circuit seriatim through the several resistance coils thereby increasing or decreasing the intensity of the electric light, and means for moving said carriage longitudinally in' reverse directions, comprising power mechanism and gearing 'operatedv thereby for moving said'carriage during the printing operation, means for automatically releasing said driving gearing, and a vreturn weight with parts operated thereby for restoring said carriage to the initial position. l1. Apparatus ofthe character described, :omprising a platform with a light aperture therein', and an electric light mounted below said aperture; an electric circuit connected to said light, and including a series of resistance coils, a reciprocating traveling carriage, means for holding the negative and positive films in superposed position thereon when moving in one direction, means for Y separating the two films and.for simultane.

ously feeding the positivefilinwhensaid carriage moves in @the opposite 'direction, 7

I `means controlled by said carriage for closinitial position.

ing the electric vcircuit seriatim-throughthe several resistance coils, therebyincreasingl of the electric.

lor decreasing the intensit light, and vmeans for moving said lcarriage longitudinally in reverse directions, comprlsing power mechanism and 'gearing -op'-- erated thereby for moving said cama' dur-v ing the printing operation, means or alitomatically releasing said driving gearing,

and a return' weightwith parts operated thereby for re storing *said carriage to the .12. Apparatusof the character described,

-comprising a platform with a light aperture door, means `for holding said door in the closed position on said carriage, with the films su-PerpOSed, means `for releasing said door and allowing it to lfiy open -thereby separatin said films,means for feeding the positive lm whilethe dooris in the openv position, means for moving said carriage longltudlnally 1n .reverse dlrections, and

means controlled by said carriage for closing the electric circuit seriatim through the several resistance coils, thereby increasing or vdecreasing the intensityof the electric light.

13. Apparatus of thecharacter described, comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an 'electric circuit connectedto said light, and including a series of resistance coils, a reciprocating traveling car- .45 said carriage, means for threading the nega-` tric circuitseriatim t riage, avspring, controlled door hinged to tive film through said carria and or threading the positive film' t rou h said door, means for holding said oor in the closed .position on said carriage, with the 'films superposed, means for-.re-

leasing said door and /allowin it to fly.

open thereby separating'` said lms,' means forfeeding the positive rfilm v'while' the door is in the open positionmeans e011-,`

trolled by said ca'rriage' forhclosing the elecroug x theseveral resistance coils, thereby. increasing or decreaszping .the intensity'of the electric light, Aand sof' means for-moving said4 vcarriage longitudi n lly in. reverse'dlrections, compri'sin powerpm'echanism and gearing operated thereby for movingsaid carriage duringthe rinting operation, means for automatical y releasing said drivin'ggearing, and a return" and means for movin weight with parts operated thereby for re storing said carria e to the initial positlon.

1'4. Apparatus o the character described, -comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an electriccircuit connected,

'to said'light, and'including a'series of re.-

sistance coils, a reciprocating traveling' car-p. l

ria .a spring controlled, door hinged to sai '-carriage, means for threading the nega-l tivefilm through said carriage,.'and Iton.y threading the positive film through said door, means'for vholding said door in fthe closed position on said carriage, with the films superposed, means for releasingy said door and allowing itl to fly 'open'. thereby f 4s'eparating-said films, means for vfeeding the positive m whileithepdoor is in the open position, comprising a pinion carried by the door, film feed mechanismdriven byv said. pinion, and a rack' secured' tosai'd platform and engaging. said pinion as the carriage returns to the'initial position, leansv controlledjby said carriage 'for' closing the electric circuit seriatim through the several resistance coils thereby increasing or dei; creasing the intensity of the'electric light A tudinally in reverse irections, comprising' power mechanism and `gearlng operated thereby for moving said `carriage during the prmtmg operation, means 'for automatically releaslng sald drlving gearing, and'means said carriage longifor restoring said\ carriage tothe initial. l'

position.

; 1,5. Apparatus tf thephmcter described,

comprising' a platform with a lightl aperture therein, and lan electric light I nountedv 1 below said aperture; an electriccircuit connected to saidilight, and `including a series` of resistance coils, a reciprocating traveling' carriage, a spring contro led door hinged to' said carriage, means for threading the negative film through said carriage, and for threading the positive -film through said films superposed,.means for releasing said doorand allowing 'it to fly openV thereby separating 'said flms,.means for feeding the positive film while'. the Vdoor is in the 'open position, comprising a pinion carried bythe door, film feed mechanism driven by said Y pinion, and a rack secured to said platform and `-engaging'said pinion as the-carriage returns to the initial position, means controlled by said carriage -\forclosing"the electric cir- 11o door, means for ,holding-said. vdoor in .the closed posltion on said` carri-age, with the ."cu'it seriatim through the'several resistance.

coils, thereby increasing orl decreasing-$116.

intensity of the electric light, and means for movingsad carriage longitudinally. in reverse directions,y compri/sling power mecha-` nism and gearing' o erated thereby for moving said carriageVA u ringl the` 'rmting operation, means for automatica lyreleasing with `parts Aoperated thereby for restoring t o said light, and including a series of resist` ance coils, a reciprocating traveling carriage,

said carriage to the initial position.

1 6. Apparatus ofthe character described, comprising a platform with a light aperture therein, and an electric light mounted below said aperturej'an electric circuit connected a spring controlleddoor'hinged to saidcarriage, means for threading the negative film through said carriage, and for threading the positive film through said door, means for holding said door -in the closed position on said carriage, with the lilms superposed,

means for releasin sa'id door and allowing itl to fly open there y separatin said films,

`means for feeding the positive fi while the 'door is in the lopen position, comprising a" pinion vcarried by the door, filmI feed mechanism driven by said pinion, and a rack secured to said platform and engaging said pinion fas the carriagereturns to the initial position, vmeans for moving said carriage longitudinall l'in reverse directions, and means contro led by said carriage for closing the electric circuit seriatim through the comprising a platform with a light aperture several'resistance coils, "thereby increasing or decreasing the intensity of the electric light.

17. Apparatus of the character described,

therein, and an electric light mounted below said aperture; an electric circuit connected to said light, and including a series -of resistance coils, a reciprocating traveling carriage, a spring controlled door hinged to said carriage, means for threading the negative film through said carriage and for threading vthe positive film throughsaiddoor, means for holding said door in the closed position' on said ycarriagefnivith the films superposed, automatic means for releasing said vdoor and allowing it tofly open thereby separating said films,l automatic means for feeding the positive film while the door isin the open position, and means controlled by said carria e for closing-the elecvtric circuit seriatiin t rough the several resistance coils, thereby increasing or decreasing the intensity of the electric light, and means' for moving said carriage longitudinally in reverse irections.v

18. Apparatus of the character described,

comprising a platform with a light a erture therein, and an electric light mounte below said aperture; an electric circuit connected to said light, and including a series of resistance coils, a reciprocating traveling carriage, a spring controlled door hinged to said carriage, means for threading the ne a-y tive film through. saidicarriage and or threading the positive film through said door, means for holding said door in the closed position on said` carriage, with .the

films superposed,'automatic means for re-i' lintensity ofV the electric light, and means for moving said carriage longitudinally in reverse directions,"comprising power mechaiiismand' gearing operated thereby for moving said carriage during the printing operation, means for automatically releasing said driving gearing, and a return weight with parts operated thereby for. restoringsaidcarriage t0 the initial position. .e

19.A Apparatus of the character described, comprising a platform with .a light aperture therein, and an electric light'mounted below 'said aperture; an electric circuit connected to'said light, and including a series of resist-1' ance coils, a. reciprocating traveling car.- riage, a' spring controlled door hinged to said carriage, means for threading the nega- `tive-film through said carriage, and for l 'threading the 4positive lni through said door, a spring catch for holding said door in the closed position on said carriage, with the films superposed, a cam for automatically releasing said spring catch and allowing'said 'door to fly open thereby separating said films,means for feeding-the positive film while the door is in the open position,

comprising a pinion carried by the door, film feed mechanism driven by .said pinion, and a rack secured to said platformvand engaging said pinion as the carriage returns to the initial position, means controlled by said carriage for closing the electric circuit seriatim through the several resistance coils thereb increasing or decreasing the` intensity o the electric light, and

means for moving said carriage longitudinally in reverse directions.

. 20. Apparatus of the character described, comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an electric circuit connected to said light, and including a series of resistance coils, a reciprocating traveling carriage, a spring 'controlled door hinged to -said carriage, means for threading the negative film through said carriage, and for threading the positive filml through said door, va spring catch for holding said door 'in the closed position on said carriage, with the films superposed, a cam for. automatically releasing said spring catch and allowing said door to fly o en thereby separating said films, means for eeding the positive film while the' door is in the open position, comprising a pinion carried by the door, film 'feed mechanism driven by said pinion, and a rack secured to said platform and engaging said pinion as the carriage returns to the initial position, means controlled by and gearing operated thereby for moving l`nism driven. by said pinion, and a rack said-carriage during the A printing operation, means for automatically releasing said driving gearing, and means 'for restoring said carriage tothe initial position.

21. Apparatus ofthe character described, comprising a platform with alight aperture therein, and an electric light mounted below said aperture; an electric circuit connected to said light, and including a series of resistance coils, a reciprocating traveling carriage,

a spring controlleddoor hinged to said car-,-3

riage,.1eans for threading the negative film through said carriage, Vand for threading the positive` film through said door, a vspring catch for holding said door in the 'closed position on said carriage, with the films4 superposed, a cam for automatically releasing said spring catch and allowing said door to fly open thereby .separating said films, means for feeding the positive film while the door is in the open position, comprising a pinion carried .by the door, film feed mechasecured to said platform and engaging said pinion as the carriage returns to the initial position, means controlled by said carriage for closing the electric circuit seriatim through the several resistance coils, thereby increasingv or decreasing the intensity of the electric light, and means' for moving said carriage longitudinally in reverse directions.

22. Apparatus of the character described, comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an electric circuit connected to said light, and including a series of resistance coils, a reciprocating'traveling carl r1age, a spring controlled door hinged to -said carriage, means for threadingthe negative film through said carriage, and for threading'the positive film through said door, a spring catch for holding said door .in the closed position on said carriage, with the films superposed, a cam for automatically releasing said spring catch and allowing said door to fly open thereby separating sald films, means for feeding the ypositive film while the door is inthe open position,

comprising a pinion carried by the door,

-flm feed mechanism driven by-said pinion,

and a-rack'securedto said'platform and engaging said pinion as the carriage returnsi to the initial posltion, means vcontrolled vby said carriage for closing the' electric circuit seriatimthroughthe several resistance coils, vthereby, increasing or decreasing. the

operated thereby for restoring s'aidcarriage to the initial position.

- 23. Apparatus of the character described, comprising a platform with a light aperturetherein, and an electric light mounted below said aperture; an electric circuit connected to said light, and including a series of res istanc-e coils, 4a reciprocatin traveling carriage, a spring controlled cgloor hinged to said carriage, means for threading the negative film through said carriage, and for threading the positive film through said door, means for holding said door inthe closed position on said carriage, with the films superposed, means for releasing said door .and allowing it to ily open thereby separating said lms, means for automatically locking said door in the open position, means for feeding the positive film while the door is in the open position, comprising a pinion carried by the door, film feed mechanism driven by said pinion, and a rack secured to said platform and engaging said pinion as the carriage returns to the initial position, means for moving said carriage longitudinally in reverse directions, and means controlled by said carriage for closing the electric circuit seriatim through the several re- 10o sistance coils, thereby increasing 'or decreasing the intensity of the electric light.v

v 24. Apparatus ofthe character described, comprisin a platform with a light aperture thereln, and an electric light mounted below said aperture; an electric circuit connected to said light, and including a series of lresistance coils, a reciprocating traveling *positive film whilev the, door-is in the open i position, and means controlled bysa'id carriage for closing the electric circuit seriatim throughy the several resistance-coils, thereby increasino' or decreasing the intensity of the electric llght, andA means for moving said carriage longitudinally in reverse directions.

25. Apparatus ofthe characterk described, comprising a platforlnwith adight aperture therein, and anl electric light mounted below said aperture; an electricfcircuit'connected -180 to said light, and including a series of resistance coils, a reciprocating traveling carriage, a spring controlled door hinged to said carriage, means for locking said door in the open position, means for threading the negative film through said carriage and for threading the positive film through said door, means for holding said door in the closed position on said carriage, with the films siiperposed, automatic means for releasing said door and allowing it to fly open thereby separating said films, automatic means for feeding the positive film while the door is in the open position, means controlled by said carria. e for closing the electric circuit seriatim t rough the several resistance coils,.thereby increasing or decreasing the intensity of the electric light, and means for moving said carriage longitudinally in reverse directions, comprising Y, power mechanism and gearing operated thereby for moving said carriage during the printing operation, means for automatically releasing said driving gearing, and a return weight with parts operated thereby for restoring said carriage tothe initial position, with a shock absorber interposed between the carriage and the platform and actuated as said carriage returns to the intial position. f

26. Apparatus of the character described, comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an electric circuit connected to said light, and including a series of resistance coils, a reciprocating traveling carriage, a spring controlled door hinged to said carriage, means for threading the negative film through said carriage, and for threading the positive film through said door, a spring catch for holding said door in the closed position on said carriage, with the films superposed, a cam for automatically releasing said spring catch and allowing said door to fly open thereby separating said films, means for automatically locking said door in the open position, means for feeding the positive film while the door is in the open position, Icomprising a pinion carried by the door, film feed mechanism driven by said pinion, and a rack secured to said platform and engaging said pinion as the carriage returns to the initial position, means controlled by said carriage for closing the electric circuit seriatim through the several resistance coils thereby increasing or decreasing the intensity Yof the electric light, and means for moving said carriage lon itudinally in reverse directions.

2 Apparatus of the character described, comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an electric circuit connected to said light, and including a series of resistance coils, a reciprocating traveling car-- riage, a spring controlled -door hinged to said carriage, means for threading the negative film through said carriage, and for threading the positive film through said door, a spring catch for holding said door in the closed position on said carriage, with the films superposed, a cam for automatically releasing said spring catch and allowingsaid door to fly open thereby separating said films, means for locking said door in lthe open position, means for feeding the positive film while the door is iii the open position, comprising a pinion carried by the door, film feed mechanism driven by said pinion, and a rack Secured to said platform and engaging said pinion as the carriage returns to the initial position, means controlled by said carriage for closing the electric circuit seriatim through the several resisitance coils thereby increasing or decreasing the intensity of the electric light, and means for moving said' carriage longitudinally in reverse directions, power mechanism and gearing operated thereby for moving said carriage during the print-ing operation, means for automatically releasing said driving gearing, and means for restoring said carriage to the initial position, with a shock absorberinter osed between the carriage and the plat orin and actuated as said carriage returns to the initial osition.

28. pparatus of the character described, comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an electric circuit connected tol said light, and including a series of resistance coils, a reciprocating traveling carriage, a spring controlled door hinged to said carriage, means for threading the negative film through said carria-ge, and for threading the positive film through said door, a spring catch for holding said door in the closed position on said carriage, with the films siiperposed, a cam for automaticomprising4 cally releasing said spring catch and allowosition,

and means for moving said carriage longitudinally in reverse directions.

29. Apparatus of the character described, comprising a platform with a light aperture therein, and an electric light mounted below said aperture; an electric circuit connectedY in. said -ii'ghwna inenting a sans' "of resistance coils, a reciprocating traveling'can 'riage, a spring controlled door hinged l"to vsaid carriage, means for threading the negative film through said carriage, and vfor i threading the positive film through said door,

Y a spring catch for holding said doorfin the open. position, means for feeding the positivekfilm vwhile the door-'is inthe open posi-v l5 closed position on said carriage, with the films superposed, a cam for automatically releasing said spring catch and allowing said door to fly open thereby Vsaparating said films, means for automatically locking said doorl in lthe tion, comprising 'a pinion carried by the door, film feed mechanism driifenby said pinion, and a rack secured to saidplatform and engaging said pinionV as the carriage returns to the initial position, means controlled bysaidcarriage for closingthe electric circuit seriatim through thev several resistance coils, thereby increasingordecreasl ing the intensity of the light, and means for moving said carriage longitudinally in re-` verse directions, comprising power mechanism and gearing operated thereby, means for automatically releasing said driving'gearing, and areturn weight with parts operated thereby for restoring said carriage to the initial position,v With a shock absorber interposed between the carriage'and the platform.

. and actuated as said carriage returns to the initial position. 30. .Apparatus of the character described, comprising a platform with a light, aperture therein, and an electric light mounted below said a erture; an electric circuitconnected to sai light, and including a series of rcsist'ance coils, a reciprocating traveling carriage, a spring controlled door hinged to said carriage, means for threading the nega# tive film through said carriage, and forthreading the positive lm through said door, means for holding said door in the closed position on said carriage, with the films superposed,'means for releasing said door and allowing it to fly open thereby separating said films, means for automatically lockingsaid door in the open position,

means forfeeding the positive film while the door is in the open position, comprising a pinion carried by the door, film feed mechanism driven by saidpinion, and a rack'secured to said platform and engagin said pinion as the carriage returns lto the initial position, means controlled by said carriage for 'closing the electric circuit seriatim through the several resistance coils thereby increasing'o'r decreasing the intensity of theelectric light, and means forAmoving said carriage longitudinally in reverse directions, comprising power mechanism and gearing operated thereby for moving said carriage during the printing operation, means for4 automatically releasing said driving gearing,

and means for restoring said carriage to the initial position, with a shock absorber inter,-

posed between the carriage and the platform and actuated as said carriage' returns to the initial position.

31. Apparatus of the character described, comprising a platform witha light aperture therein, and-an'electric light mounted below saidlight, and including a series of resistance coils, a reciprocating traveling carriage, a

' said aperture; an electric circuit connected to spring controlled door hinged to` said car riage, means for threading thevnegative film through Ysaid carriage, and for threading the positive film throughsaid door, means for holding said' door in the closed position on said carriage, with the -films-V superposed, -meansfor releasing said door and allowing turns to the initial position, means controlled by said carriage for closing vthe electric circuit seriatim through the several resistance coils, therebyv` increasing. or decreasing the intensity of the2 electric light, and -means for movin saidl carriage longitudinally in rev verse irections, comprising power'mechanism-and gearing operated thereby for moving said carriage during the printing operation,l means for automatically releasing said driving gearing, and a return weightv with parts operated. thereby for restoring said carriage to the initial position, with a shock l absorber interposed between lthe carriage and the platform and actuated as said returns to the initial position.

32. Apparatus of the'character described, comprising a platform with a light aperture therein, and an electric light mounted below to said light, and including a series of resistance c oils, a reci rocating traveling carriage, a spring control ed door hin ed to said car.- riage, means for threading t e negative film positive; film through said door, means for holding the door in the closed .position on saidv carriage, .with the films4 superposed, means for releasin said door and allowing it to fly open theroy separating said films, means for automatically locking said door in the open-position, means lfor' feeding the carriage said aperture; an .electric circuit connected positive film while the door .isin the open position, means. for moving said carriage longitudinally' in reverse,` directions, and means contro .led by said carriage for closing lthe electric circuitseriatim through the several resistance coils, thereby increasin or decreasing the intensity of the electric light.l

11-5 through said carriage, and for threading the 33. Apparatus of the character described, comprising an electric light, and an electric circuit therefor, a partition with a light aperture therein, means for passing the negative film and the positive film to be printed in superposed relation past said aperture, and means controlled by said last mentioned means for varying the intensity of the light passing through said aperture, comprising a series of reslstance coils included in the electric circuit, and a bridge moving With said films and closing the electric circuit successively through said resistancecoils.

34. Apparatus of the character described, 

